Shock-absorbing device.



E. BI'M'AH-HO. BROOK ABBOBBIHG DEVI. pinion-Io! nun 001.0, 1010.

lllll llu Fly. 2.

2 Samara-sum 1.

' Patented July 23, 1912.

1:; RIMAILHO.

SHOCK ABSORBING DEVICE.

APPLICATION FILED OG'1.6, 1910.

Patented July 23, 1912.

2 SHEETS SHEET 2 Inventor:

Z A Atty 1,033,348. Original application filed December 30, 1909, Serial No. 535,673.

EMILE nIMAILno, or nnmmiy snn ssmn, FRANCE, ASSIGNOR TO SOCIETE ANONYME DES SUSPENSIONS ET EOUES FLEXIBLES,

OF PARIS. FR.A.NCE.

SHOCK-ABSOBBING nnvlcn.

Specification of Letters Patent.

Patented July 23, 1912.

Divider] and this application filed October Serial No. 585,565.

of the present invention to arrange such an apparatus in sucha way as to form a special irreversible shock-absorbing device or buttfer, for use in the elastic suspension of motor cars and other vehicles, and designed to be placed preferably between the framing of the vehicle and sion spring.

The invention consists of an irreversible elastic butter in which one of the two interfitt-ing supports forms a container for liquid and carries a pump barrel, a sleeve or socket, or a piston, while the other support carries the corresponding complementary element, piston or sleeve or socket, the bottom of the sleeve and the head of the piston when at rest, being immersed in the liquid in the con tainer, so that upon compression of spring, the relative movement of the piston and the bottom of the sleeve or socket away from each other, forms at the bottom ofthe latter a chamber wh ch is freely filled With the liquid taken from the container through a valve, While the expansion of the-spring is impeded by theimprisonmentot the liquid in the said chamber and its slow return through a narrower orifice to the mass of liquid in the container, braking being thus effected without any tendency to force the liquid out of the apparatus.

The present application is a division of my application for patent filed December 30th, 1909, Serial Number 535,673, and the form of invention herein shown described and claimed is that wherein a fluid is employed as the means for braking the recoil movement of the shock absorbing element used. in shock absorbing devices.

In the accompanying drawing, wherein the preferred embodiment of my invention is illustrated Figure 1 is a vertical sectional View of a shock absorber constructed according to my invention; Fig. 2 is a similar View the end of the usual SUSPQIP l of a. modified form thereof; and Fig. 3 illus a 5 trates the application of the modified form of the invention to a vehicle; and Fig. 4: illustrates the application of the form of invention shown in Fig. 1 to a vehicle.

In both forms of the invention the structure includes a pair of suitable supports, a compression spring a, and a braking element such as a quantity of liquid 6 which acts to impede the recoil of the spring a.

In the form shown by Fig. 1, the support I), carries a pump body (2 the other support 0, formed by a cylinder filled with liquid 6, carries a rod 0 surmounted by a piston 7, having the usual cupped leather. or made in segments,- on which slides the pump body 1). The latter terminates in a disk 8 forming a seat for a flap-valve 9, whose lifting movement is limited by stops 10 carried by the pump body. In the position of rest shown in Fig. 1, the piston 7 is normally at a small distance from the bottom 8 of the pump body and the level of the liquid is such that it; covers the piston. lVhen, on account of a compression of the spring a, due to shocks imparted to the vehicle, the'pump body I) descends with inspect to the fixed piston 7, the fiapwal ve i) lifts slightly and a quantity of liquid which is greater as the compression of the spring is greater, finds its way freely into the chamber 11 of variable volume limited between the underside of the piston 7 and the upper side of the disk 8. As soon as a recoil movement of the spring tends to be produced, the fiapvalve 9 is brought back to its seat 8 bythe movement of the liquid so that the latter introduced into the chamber 11 is imprisoned therein. Its escape is possible onlywthrough the narrow orifices 12 provided in the flap-valve or the walls and thus the recoil movement of the spring 0 is. impeded. The pressure however which is produced in the mass of liquid thus imprisoned, is localized in this mass, without the remainder of the liquid in which the pump body is immersed l eingaused to leave the apparatus. The movements of the liquid are produced in the center of the total mass oi liquid between the chamber 11 and the container, and a part oi. the air contained in the upper chamber 13 of the pump body may, upon compression of the spring, escape outside through a passage 14..

in the form of invention illustrated in Fly, the support f forms thc pump ho 162 Madly closed by the plug 15 and is col f tcly filled Willi liquid (3, 'lho oihcr my is constituted by an clcuu'rnt of :1

moromoul'.

(i by f u lisp-shim according to the direction ot' spring a, due to shotks imparted to tho \c 5 111010. the pump body if dcsi'iends with spect to the susponsiim rod c?- which is sup posed to be fixed the hottoui 15 of th pump hody moics away from the pist n c tho ilHP iEl C 9* remains down, and the? alt.- uid rushcs under the piston through ll'r: orifices 17. is soon as a recoil tends to i) producod, the. flap-valve 9* rises and closes the orifices 16. and the liquid thus tram.- tcrrcd under the piston is iuiprisomd in the ('lmmlu-r 11 hctwcon the said pistmi and the hottoui 15, the niembors occupying the positions indicated in cluiin-doth l lines; Slum: the liquid can only pass shove the pis ion again through the narrow orificvs 152 tho recoil mowiuvnt is retarded Tin; gin; sure, lioi'vovci, which is produced in th imprisoned, liquid is not transmitted to the liqui plucwl allow the piston and nothing tends to musc the liquid to leave thc appa rzl us. The volume produced under the piston lr-oing equal to that shove it, plus tho volume Poiresponding to that of tho od u. in order to reduce this ditierencc, it; will he Sullicicut to make the rod 0 hollow and to provide the bottom 15 at the center with a cmmtor-rod 1S sliding in the said lu-llow rod.

Fig. 3 shows tho application of the form of iuvontion disclosed in Fig. to o, Vchiclo and it will be notod lhzitthe iii-m n which is lived to the vehicle frame engages iruu niolas 50 formed on the casing if. The V0; hiclo spring 8 pivctsilly supports a spring link r to Which is pivolally uttuchcd at 52 the rod 1: of the shock ahsorhiug device.

In Fig. '-l, where thc upplioutiou oil tho device showr n Fig. I. to :1, vehicle disclosed, thc iii-m p is c mncvtwi by lIliPalTlS of a bolt 51 with tho art of the Summit 5, While tho which: so; 11g: a is pivolully connected hi moons of a bolt 52 with the spring link 9 tho other and of the spring link ho iug coruuwiml to the lruuuions 50" carried by the support c.

The incoutiou has hciciu Luau dosrrihoil in connection with Whiclos, but it is to he undcrstoo'il llnl its use not so limited and that it ms am used for numerous other purposes, such int oxumpic as an elastic seat, or between an UViiiflill') seat and its supporting legs.

l l l l l l l l l i l l l i l l l mid twining Yil'l"; tho piston two Walls of 'ocuhlo supports uni in in y A, k

{Hi ton so oauthor Sim purlit u in con Join {ii ion it-s, the rci i i. i rccip an inner chamber coutiiiniu holly of liquid a coiled suing having: iis ends shutting the inner end faces of id sup 'iorts, :1. piston within said chamhciz :1 partition within suid rhainlwr spaced from the pis hirt'uiiigf with tho iatter :ui mixil n'; s-lsioiwi to (x stain a i U than the snoic ho-ilg; inner chamber, a port in so d partition il-iroug'rh which liquid is :uiluptwl to puss from flue said iimor chamher into the auxiliary cluunlwr, and a valve loose in said iil'fliliiily cluuuher and adapted to he ()jhil'ilifii'l sololy by tho action of said liq uirl, said 'flllYl? having c ns ricted passages llicrelhro'ugh through which liquid is adopt-- ed to pass from the auxiliary chsmher into the said inner chiiml cix 3. in mi irro crsihle Plt'lSllC butler adaptcd for attzuriumeut in vertical position to the suspension springs of vehicles, the combination of a, metal spring a pair of iuterfits ting supports adopted to luivc rclutivc movement and inclosiui f said spring, one of said supports containing :1 body it liquid, :1 pump barrel cor: m h one oi mid supports and :1 piston by tho other 'Whcroh}: whcn said parts are at rcsl the bottom of the harm] and tho h ad of the piston are immersed in. the liquid, and :i frcvly mo'ahlo valve iii l orrziugod m prpximity to said piston, said minlmving i'Hlilll'i'fllV narrow outlet orificcs Whcrohy upon compression of said spring the relative movement of said lIiSlOR and the bottom of said lbarrel away from cich other forms a chamber at the bottom of said iuu'rcl inlo which liquid passes freely from the body of liquid in one of said supports, and the expansion of said spring impeded by the slow 145M! rm of liquid out of said fllflilillfil thror 1 H1 .aurrow orifices in the 'idvo.

-i. in an irreversible clusliic lmilor adapted for uimcluucnt to the suspension springs of SlilClQ-h, the combination oi a. coiled metal spring, a pair of vertically arranged interfitting supports adapted to have relative movement and incloslng said spring, one-of said supports containing a body. ofliquid, a pump barrel. carried by one of said supports and a. piston carried by the other support and being normally near the bottom of the sup ortcontaining the liquid whereby when the said parts are at rest the bottom of the barrel and the head of the piston are immersed in the liquid there being an opening of substantial area, to admit liq uid. under said iston and avalve freely movable b the liquid in the container, said 1 valve having relatively narrow outlet orifices therein whereby upon compression of said spring the relative movement of the piston and the bottom of the barrel forms a chamber of variable proportions into which liquid passes through said opening of substantial area, and the expansion of said sprin is im eded by trapping liquid in said cham er an the slow passage of said liquid out through the narrow orifices in said valve.

In testimony whereof I have aflixed my 25 signature'in presence of two witnesses.

, EMILE RIMAILHO.-

Witnesses:

' HENRI MORIN,

H. O. Come. 

